How do you make the camera point in the same direction throughout a animation?
Use [Track To] Constraint or perhaps secondly the [Locked Track] Constraint on the Camera.
You can use this constraint as a complement to the camera  moving along a path.
Often you may use a third object to as a target to look at specific locations of another object.  In the building example you could move any non rendered object to focus the track on floors or windows.




These constraints will point the camera at a target which can be moving or stationary.

There are free video tutorials on the settings of these constraints on various websites.  You can also experiment to determine the correct settings for you in a few minutes.